This is normal when a new release happens: The first trickle of cards that hit retail are often the ones being built pretty much by hand in small quantities by the manufacturers as they perfect their build and automation processes. Sometimes you'll get beta software on the cards, and sometimes you even get pre-prod hardware (beta versions of the chips) as the manufacturers clear their benches. It's one of the reasons why I usually wait a few months before considering buying a newly released GPU, because I've gotten some pre-prod hardware in the past, and those usually need more work over their lifetimes to keep them running. (Although to be fair, I've still had good experiences overall, even with the beta hardware. It's the hand-built aspects that tend to need to get repaired over time, e.g. the pads, the grease, ...)